45 lines
1.3 KiB
Markdown
45 lines
1.3 KiB
Markdown
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# pong catapult
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One of the easiest robotics projects, with a single motor and repeatable interactions.
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Distance where the ball launched could be controlled with motor speed.
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Photos and video: [lego-catapult-photos.md](lego-catapult-photos.md)
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## Required components
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- Lego Ev3
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- wifi dongle
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- microsd card
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- some lego parts
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- several ping pong balls
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## Steps
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1. Install linux on sd card for ev3 brick.
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https://www.ev3dev.org/docs/getting-started/
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1. Download, unzip.
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2. If linux: `sudo dd if=ev3dev-stretch-ev3-generic-2020-04-10.img of=/dev/sdb bs=4M status=progress conv=fsync`
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1. then `sync`
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3. If windows: use win32diskimager or similar app.
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4. Wait 2-10 minutes so OS image is written to the card.
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5. Turn on, connect to wifi.
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2. Test app for motors.
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1. Get the project from https://git.makerobots.eu/konstantin/lego-ev3-java .
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2. Update IP address.
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3. Connect motor to port A .
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4. Run gradle deployAndBrickRun task.
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5. When the brick beeped, press the right button to test motor.
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3. Assemble a sturdy structure with a motor.
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4. Place ball and test.
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5. Iterate (structure and code) and try to launch a pong ball:
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- as far as possible
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- as high as possible
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- exactly 30 cm (use the plastic cup or some bowl)
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- exactly 1-meter distance.
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